package com.bright.ghj.common.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @author Tz
 * @date 2024/01/22 15:03
 * @Description 从spring容器中获取bean的工具类
 */
@Component
public class ApplicationContextProvider implements ApplicationContextAware {

    /**
     * 上下文对象实例
     */
    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        ApplicationContextProvider.applicationContext = applicationContext;
    }

    /**
     * 获取applicationContext
     *
     * @return {@link ApplicationContext}
     */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 通过name获取 Bean.
     *
     * @param name bean名称
     * @return     实例对象
     */
    public Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }

    /**
     * 通过class获取Bean.
     *
     * @param clazz Class
     * @param <T>   类型
     * @return      对应类型的bean实例对象
     */
    public <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }

    /**
     * 通过name,以及Clazz返回指定的Bean
     *
     * @param name   bean名称
     * @param clazz  Class
     * @param <T>    类型
     * @return       对应类型和bean名称的bean实例对象
     */
    public <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }
}
